@9
Saying you want to practice the XY plane is like saying you want to program in terms of how general you're being. You'll have to be more specific. If you're hoping to just plot points or something, you'll have to have something tactile for that, but you won't really spend more than 5 minutes figuring out how that works before moving on.
I don't know what resources are in India, but I know there are some. Also, just because APH is American doesn't mean they won't ship there. It might cost you an arm and a leg, and APH specifically may not, but being in America doesn't rule it out.
There are lots and lots of better options, but the easiest thing you can get for tactile graphics when it comes to "I don't have access to blindness-specific resources" is something like these: https://www.amazon.com/WikkiStix-WIK804 … B0011E2S7C
I used those when i was a kid and as soon as I had proper braille graph paper and, later, the draftsman, I hated them. But you can get them at normal craft stores in the U.S. and can probably find something similar over there.
There are also some forms of paint that you can get, possibly also at craft stores, which are designed to make raised lines when you paint with them.
You'll still have to have someone sighted involved and in the long run you'll have to sell your soul for braille, but this kind of stuff can work as a decent workaround and was state of the art in the 1990s or so.
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